Best prop for showtime 4d with an OS 108 fsr in it

[mv-warbird]

ive tried an APC 15/6,16/4w,17/4w,with not so good vertical results.
it wont pull out of a hover.
this same engine just came out of a lanier 1/4 scale laser with an apc 15/8 prop.
the laser would pull vertical just fine for a plane at least 2 lbs more than the showtime.
are there any other prop out there that will fix this problem.
motor has plenty to go vert for sure.forgot to mention that i run cool power 10%.

any help would be great.

[thewrap]

You just have to try some different props to see which one you like best for the tryp of flying you do.

[mv-warbird]

oh yeah, dont get me wrong,this plane rocks!it can sport fly,pattern and 3d.like you said what more can you ask for.
im just confused at why the same engine with a larger 3d prop on it wont pull a plane thats almost 3 lbs lighter than the one it was in(1/4 scale laser)and a 15/8 apc would pullit to the sky from a stall or a wall.

gonna try a 15-8 apc on it next, after that its gonna be a few bucks in props i suppose till its 3d friendly.

if i had the cash i would put a saito or ys in it and be done.but i know this 108 has more power than an evo 100 and ive seen showtimes pull out of hover no prob with the evo.


thanks for the help.

mv

[BillyGoat]

Well, you certianly have a mystery. Tell you what I have in my Showtime. I'm running a OS 120 Surpass II.
I started with a 15-8 zinger and verticle was so so. Just recently I put on a APC 16-4w and it's much better performance all around.

Your engine might be running too hot. The Showtime cowl allows a lot of air to enter, but getting a good 4 to1 ratio for the exit air is difficult. When I switched props I basically removed the entire bottom protion of the cowl at the same time for better cooling.

[mv-warbird]

thanks billy,

i did notice the engine was on the warm side,but i dont have a temp gauge.
without that even 180degrees seems hot.this engine evidently dont like fun fly props.
i tried 2 of them so far.(16-4w and 17-4w).after the 15-8 im going to try the new apc 16-5.5 w that just came out.
we will see.

thnx
mv

[thewrap]

I'm not sure but I think you don't need speed you need torque. It'll help a little more with manuevers, torque rolling loops, rolling harriers.
The extra torque will help you not lose as much pull power in manuevers which helps with throttle control.